The Turkish police used plastic bullets, tear gas and water cannons on demonstrators protesting a curfew in the largely Kurdish city of Diyarbakir on Wednesday.
Thousands of protesters continued marching towards the city's Sur district, which has been under curfew since December, Feleknas Uca, a pro-Kurdish opposition party representative in Diyarbakir, told dpa.
The march was called by several NGOs and the chief of the left-wing People's Democratic Party (HDP), Selahattin Demirtas, in protest of a curfew placed during Turkish military operations against the illegal Kurdistan Workers' Party (PKK) in the south-east of Turkey.
Hundreds more took part in protests in areas across the city, with several throwing stones and fireworks, news agency DHA reported.
Security forces could be seen shooting plastic bullets in footage released online by IMC TV.
Curfews remain in force in several ares of south-eastern Turkey, including the city of Idil, while the army has loosened measures in Silopi and Cizre, where curfews only apply at night.